Hey did anyone catch that part near the end of the opening song where Naruto is neiling at seal and Kurama breaks through it and shines the light on Naruto and it paused for a second and naruto looked different. Was that just showing his nine-tails mode or was it something else.

I starting took think it was the Sage of Six paths that is why the seen went dark and why right after Kurama cried then smiled.